<template>
  <Transition name="move">
    <div v-show="state.showFlag" ref="food" class="food">
      <div class="food-content">
        <!-- 头图 -->
        <div class="image-header">
          <img :src="food.image" alt="image" />
          <div class="back" @click="hide">
            <i class="icon-arrow_lift"></i>
          </div>
        </div>

        <!-- 商品内容 -->
        <div class="content">
          <h1 class="title">
            {{ food.name }}
          </h1>
          <div class="detail">
            <span class="sell-count"> 月售{{ food.sellCount }}份 </span>
            <span class="rating"> 好评率{{ food.rating }} </span>
          </div>
          <div class="price">
            <span class="now"> ￥{{ food.price }} </span>
            <span v-show="food.oldPrice" class="old">
              ￥{{ food.oldPrice }}
            </span>
          </div>
          <div class="cart-control-wrapper">
            <CartControl :food="food" @add="addFood" />
          </div>
          <Transition name="fade">
            <div
              v-show="!food.count || food.count === 0"
              class="buy"
              @click.stop.prevent="addFirst"
            >
              加入购物车
            </div>
          </Transition>
        </div>

        <!-- 分割线组件 -->
        <Split v-show="food.info" />

        <!-- 商品信息 -->
        <div v-show="food.info" class="info">
          <div class="title">
            商品信息
          </div>
          <div class="text">
            {{ food.info }}
          </div>
        </div>

        <!-- 分割线组件 -->
        <Split />

        <!-- 商品评价 -->
        <div class="rating">
          <h1 class="title">
            商品评价
          </h1>
          <RatingSelect
            :select-type="_state.selectType"
            :only-content="_state.onlyContent"
            :desc="desc"
            :ratings="food.ratings"
            @select="selectRating"
            @toggle="toggleContent"
          />

          <!-- 商品评价列表 -->
          <div class="rating-wrapper">
            <ul v-show="food.ratings && food.ratings.length">
              <li
                v-for="rating in food.ratings"
                v-show="needShow(rating.rateType, rating.text)"
                :key="rating.username"
                class="rating-item border-1px"
              >
                <div class="user">
                  <span class="name">
                    {{ rating.username }}
                  </span>
                  <img
                    class="avatar"
                    width="12"
                    height="12"
                    :src="rating.avatar"
                    alt="avatar"
                  />
                </div>
                <div class="time">
                  {{ rating.rateTime | formatRatingDate }}
                </div>
                <p class="text">
                  <span
                    :class="{
                      'icon-thumb_up': rating.rateType === 0,
                      'icon-thumb_down': rating.rateType === 1
                    }"
                  ></span>
                  {{ rating.text }}
                </p>
              </li>
            </ul>
            <div
              v-show="!food.ratings || !food.ratings.length"
              class="no-rating"
            >
              暂无评价
            </div>
          </div>
        </div>
      </div>
    </div>
  </Transition>
</template>

<script>
import { reactive } from '@vue/composition-api'
import CartControl from '../CartControl'
import Split from '../Split'
import RatingSelect from '../RatingSelect'
import { formatDate, createScroll, refreshScroll, useRating } from '../../utils'

export default {
  components: {
    CartControl,
    Split,
    RatingSelect
  },
  filters: {
    formatRatingDate(time) {
      let date = new Date(time)
      return formatDate(date, 'yyyy-MM-dd hh:mm')
    }
  },
  props: {
    food: {
      type: Object,
      required: true
    }
  },
  setup(props, { root, emit, refs }) {
    const desc = {
      all: '全部',
      positive: '推荐',
      negative: '吐槽'
    }

    const state = reactive({
      showFlag: false
    })

    let scroll

    function show() {
      state.showFlag = true

      if (!scroll) {
        scroll = createScroll(refs.food, { click: true })
      } else {
        root.$nextTick(() => {
          refreshScroll(scroll)
        })
      }
    }

    function hide() {
      state.showFlag = false
    }

    function addFirst(event) {
      emit('add', event.target)
      root.$set(props.food, 'count', 1)
    }

    function addFood(target) {
      emit('add', target)
    }

    const { _state, needShow, selectRating, toggleContent } = useRating(
      root,
      scroll
    )

    return {
      state,
      _state,
      desc,
      show,
      hide,
      addFirst,
      needShow,
      addFood,
      selectRating,
      toggleContent
    }
  }
}
</script>

<style lang="scss" scoped>
@import '@/assets/styles/mixins.scss';

.food {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 48px;
  z-index: 30;
  width: 100%;
  background: #fff;

  &.move-enter-active,
  &.move-leave-active {
    transition: all 0.2s linear;
  }

  &.move-enter,
  &.move-leave-to {
    transform: translate3d(100%, 0, 0);
  }

  /* 头图 */
  .image-header {
    position: relative;
    width: 100%;
    // 高度设为0
    height: 0;
    // 设置和宽度一样100% 宽高相等
    padding-top: 100%;

    img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
    }

    .back {
      position: absolute;
      top: 10px;
      left: 0;

      .icon-arrow_lift {
        display: block;
        padding: 10px;
        font-size: 20px;
        color: #fff;
      }
    }
  }

  /* 商品内容 */
  .content {
    position: relative;
    padding: 18px;

    .title {
      line-height: 14px;
      margin-bottom: 8px;
      font-size: 14px;
      font-weight: 700;
      color: rgb(7, 17, 27);
    }

    .detail {
      margin-bottom: 18px;
      line-height: 10px;
      height: 10px;
      font-size: 0;

      .sell-count,
      .rating {
        font-size: 10px;
        color: rgb(147, 153, 159);
      }

      .sell-count {
        margin-right: 12px;
      }
    }

    .price {
      font-weight: 700;
      line-height: 24px;

      .now {
        margin-right: 8px;
        font-size: 14px;
        color: rgb(240, 20, 20);
      }

      .old {
        text-decoration: line-through;
        font-size: 10px;
        color: rgb(147, 153, 159);
      }
    }

    .cart-control-wrapper {
      position: absolute;
      right: 12px;
      bottom: 12px;
    }

    .buy {
      position: absolute;
      right: 18px;
      bottom: 18px;
      z-index: 10;
      height: 24px;
      line-height: 24px;
      padding: 0 12px;
      box-sizing: border-box;
      border-radius: 12px;
      font-size: 10px;
      color: #fff;
      background: rgb(0, 160, 220);

      &.fade-enter-active,
      &.fade-leave-active {
        transition: all 0.2s;
      }

      &.fade-enter,
      &.fade-leave-to {
        opacity: 0;
        z-index: -1;
      }
    }
  }

  /* 商品信息 */
  .info {
    padding: 18px;

    .title {
      line-height: 14px;
      margin-bottom: 6px;
      font-size: 14px;
      color: rgb(7, 17, 27);
    }

    .text {
      line-height: 24px;
      padding: 0 8px;
      font-size: 12px;
      color: rgb(77, 85, 93);
    }
  }

  /* 商品评价 */
  .rating {
    padding-top: 18px;

    .title {
      line-height: 14px;
      margin-left: 18px;
      font-size: 14px;
      color: rgb(7, 17, 27);
    }

    .rating-wrapper {
      padding: 0 18px;

      .rating-item {
        position: relative;
        padding: 16px 0;
        @include border-1px(rgba(7, 17, 27, 0.1));

        .user {
          position: absolute;
          right: 0;
          top: 16px;
          line-height: 12px;
          font-size: 0;

          .name {
            display: inline-block;
            margin-right: 6px;
            vertical-align: top;
            font-size: 10px;
            color: rgb(147, 153, 159);
          }

          .avatar {
            border-radius: 50%;
          }
        }

        .time {
          margin-bottom: 6px;
          line-height: 12px;
          font-size: 10px;
          color: rgb(147, 153, 159);
        }

        .text {
          line-height: 16px;
          font-size: 12px;
          color: rgb(7, 17, 27);

          .icon-thumb_up,
          .icon-thumb_down {
            margin-right: 4px;
            line-height: 16px;
            font-size: 12px;
          }

          .icon-thumb_up {
            color: rgb(0, 160, 220);
          }

          .icon-thumb_down {
            color: rgb(147, 153, 159);
          }
        }
      }

      .no-rating {
        padding: 16px 0;
        font-size: 12px;
        color: rgb(147, 153, 159);
      }
    }
  }
}
</style>
